Reducing-tank.



n PATBNTBD JAN. 21, 1908. R. s. REDFIE'LD. REBUCING' TANK.

A APPLICATION FILED FEB. 8, 1907.

A TTHNEY W/T/VESSES j uNrrnn sir-Arne rATnN'r aerien.

ROBERT s. RR'DFIRLD, OF EAsT ORANGE, NEW JERSEY', AssiGNOR To .ROBERT S'L-REDFILD e COMPANY, A CORPORATION or NEW YORK.

REDUCI'NG-TANK.

State of New Jersey, have invented certain nev.T and useful Improvements in Reducing- Tanks, of which the follovvin is a specification, reference being had to t e accompanying drawings.

. My invention relates to improvements in' reducingtanks for the treatment of ofial, slaughter house refuse and the like by means of steam or other suitable iuid; and

an object of my invention is to, provide a reducing tank or digeste'r which will prove simple in construction, comparatively cheap in manufacture and efficient in operation..

In 'the dra-Wings illustrating the principle of 'my invention and the best mode now known to me of applying that principle,

Figure 1 is an elevation of my newreducing tank, part of the tank being broken away to disclosey the interior arrangement ofthe.

pipes; Fig. 2 is a sectional view on line A-#A of Fig. 1; and Figs. 3 and 4r, are 'details showin the ltering device- 1 The ody 'ortion of the di ester consists of two cylin ers' one of Whic =is mounted With-in the other,` the space`bet ween. the walls of the cylinders servingy to` .provide means for jacketing the inner cylinder a with steam. rlhe inner cylinder is closed ait-both ends and its outer end b serves to closeone end of the outer cylinder c.' Theinner cylinder Ya are each provided with a hollow .trunnion and these' trunnions are journaledfin the upper ends of the standards l e.` Between the-twocylindersa andw are mounted; stays f .which strengthen and give.

rigidity to.` the structure.' The outercylin- 'dencis provided with manholes g through jacket space, themanholesare each 'rovided with inner Wal1s or partitions h. he inner cylinder a 1s provided with the usual angle- .irons or haine-plates i.

`M o`unt`ed axially inthe inner cylinderv a' earn-pipe provided with nozzles 7c and 'u n`1cat1ng with `the steam-pi e m," a

Specification of Letters Patent.

Application filed February 8, 1907- Serial No. 356.409.

'n being interposed between. t e' pipes' 7 and 1n. Near its point of emergence from the inner cylinder a the steam-pipe g' passes through a larger which is connecte with the vertical pipe message aan: 21, 1968'.

pipe o the' innerV end otc and the outer end of which is connected wit a c i the vertical pipe g. The upper' end of thev sul.:

latter communicates throu h the valve.7 with the steam-pipe m on t e one side-and. with the `air exhaust or vacuum` pipe fs through the valve t on theother side. 1, The 1 65;?

upper end of the inside vertical .pipe'pis connected with the pipe-u which extends parallel to the axial steam-pipe j and is provided with the nozzlesio. It.will1be""A understood that both the pipes j and o, the

70'- gland is provided to insure a tight joint. j

.The hollow trunnion y is sinn] arly providedf former withinthe latter,l passthrough the hollow trunnion w, and a- With a stuiiing-box zand through it extienda-l- 'alive-steam plpe 2 which commi-micatesivvi'tli.` the steamejacket space between the 'cylinders' r a and c.. Through the pipe 2 extendsapipe 3 Which communicates with a steamf-trap; 4.1

By removin vmay, be obtalned to the steam-jacket space'. y The outer Wall b of the inner cylinder wis f perforated (Figs. 3 and 4) and over the perf' ioratious 6 is removably'fitteda cover7 prof' vided- With a spigot 8.

The operation of the parts just described.

as follows: The material having been intro- 1 `duced through themanholes g to the desired--b amount, the valve r is closed and the valves n and t are opened. Live steam ows from the-pipe m into the pipe y' through the valvefnf` and issues in jets from the nozzles 7c. After i the material has been cooked sufficiently,

the'valves rz-and t are closed, and the .valver is opened, thereby allowing live steam to flow4 -fromthe pipe m past `the valve r through the pipes g, o, p and u and the nozzles o into the inner cylinder a, Where it' exerts a pressurejuponthe cooked material and forces the juices therefrom. The latter 'are strained. through `the perforations 6 and drained from the valve 1, and the valve 71, remaining closed With as uitable exhaust pum (not shown) andthe vapors and gases in t e inner cylinder are exhausted therefrom through thel nozzles t' andthe pi es u, p, 0,'g and s past the val-ve t. During t e time the air-pumpis y'being operated, the spigot 8 is closed. i At '110 100.. the tank by the spigot 8.' The nextstepis 1. to dry the residue `Which is done by closing A the same time the valve 9 is opened and live steam is allowed to flow-through the pipe. 2 into 'the steam-jacket s ace'between the cylinders. cientl .and the tank is rotated on its trunnions yw and 'y `by turning the worm 10 which meshes with the the trunmon y. The manholes having been ,p brought near the floor, the dried residue is removed through the manholes g. The'water of condensation is removed from the steamjacket space by the steam-trapllthrough the pipe 3. 1

Since the pipe g is connected With the exhaus't during the time of cooking. ,.the lat-A ter is done under a vacuum and,therefore',at

a lower temperature than would` be other-.f

Wise possible. This results in yielding an oil much li hter in color and for this reason more valua le to the trade. Further, during the time of cooking, the vapors and frases in the tank are drawn ofi past thevvazlve t through the pipe s, "thereby eliminating all disagreeable odors. The live steam enters directly into the mass of the .material through the nozzles r and by its intimate contact with the fats, cooks them in much less time. Further, this arrangement of the nozzles lc insures that the fats willbe cooked evenly and that there will be no cold spots and, therefore, no'vsour lard. `By means of the iilter, itlis possible to recover ten per cent. ,more oil than could be obtained Without it, a large percentage ,of the water is eliminated from the tankage and the residue is dried in a shorter time and with less steam owing to the fact that a large percentage of the Watervis pressed out and, therefore, does nothave to be evaporated.

In' my newdigester the pipes for the live steam for cooking the material are separate v.from those through which the live steam is led for the purpose of pressing the material;

.l tlons for the introduction o and the steam for cooking is thereby brought into more intimate contact with the material with the result that less steam is required. Further, pipes' of the steam for the ltWo purposes may be provided.

' By removing the cover 7 access is readily obtained to the perforations 6 and the latter may be quickly cleaned in case they become- `sto p'ed up. i

l' lP claim:

Afterthe residue has been suffi-- dried, the valves t and 9 are closed gear 11 keyed to the outer end of fproper propor-` eraan 2. n an apparatus of the character de-- scribed, the combination of a tank; a main steam pipe; an exhaust pipe; a pipe which extends through said tank near the wall thereof; a connectingpipe by which said last-named pipe is connected with said main Asteam pipe and saidexhaust pipe; a steam @pipe which extends through said connecting pipe and axially throug said tank; and valves whichcontrol the iiow of vapor through said pipes.

3. n an apparatus of the character described, the combination of a rotary tank provided'with av hollow trunnion; a pipe which passes through said trunnion into said tank; a steam-pipe which passes through said pipe and extends axially of said tank; a

pipe which is connected with the first-named pipe and extends near the wall of said tank and inside thereof; a main steam pipe; an exhaust pipe; and valves controlling the flow of vapor through said pipes; said first-namedpipe -being connected with saidmain steam pipe and exhaust pipe. i

.4. In an apparatus of the character described, the combination of a tank rotatable about' a horizontal axis and having one of its end Walls formed with holes through which the juices are strained, said holes lying in substantially a vertical plane; a cover de-v tachably secured to said end wall over saidholes and provided with a shaft-controlled outlet for the juices; and pipes for the introduction of steam Iinto said tank to extract the juices from the material to'be digested.

In testimony whereof I have hereunto set my hand at New Yorkv city, N. Y. this sev.-

enth day of February, A. D. 1907, in the presence of the two undersignedgwitnesses. ROBERT S. REDFIELD. Witnesses: y i

JAMES HAMILTON, M. HAMILTON. 

